Elevator control system



Feb. 2, 1937.

H. w. WILLIAMS ELEVATOR CONTROL SYS TEM Filed Jan. 19, 1935 WITNESSES:

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ZZ@ I Lil) Patented Feb. 2, 1937 UNITED STATES PATENT OFFICE ELEVATOR CONTROL SYSTEM Application January 19, 1935, Serial No. 2,531

20 Claims.

My invention relates, generally, to electric elevators, and it has particular relation to electrical control systems therefor.

In the operation of an elevator system employing a floor selector, it is desirable to provide means operating in conjunction with the floor selector for maintaining the hall lantern lighted at a floor where a call is registered, while the car which is 'to answer the call is approaching the floor. If such means are not provided, the hall lantern will be successively energized and deenergized or will flicker as the iloor selector is operated to different floor positions. This operation is undesirable since a person registering the call will not be certain that the Correct indication of the car to arrive at the oor has been given.

The need for such a system arises particularly when a fiocr selector of the notching type is employed, although it is also present in a system in which a floor selector of the synchronous type is used. However, in the latter system it is possible to obtain the desired control function in conjunction with the operation of the switches which are used to control the motor operating the car in the shaft. When a notching type of floor selector is used, due to its intermittent character of operation, it is necessary to provide some other means for maintaining the hall lantern lighted at the floor where a call is registered as a car approaches it in response thereto.

Therefore, it is an object of my invention to provide for maintaining a hall lantern lighted at a licor Where a call is registered, as the car designated to answer the call approaches the floor.

Another object of my invention is to provide for employing a relay for controlling certain circuits to maintain the hall lantern lighted.

Still another object of my invention is to provide for employing a relay in conjunction with stationary and movable elements of the floor selector for maintaining the hall lantern lighted.

A further object of my invention is to provide for maintaining a hall lantern lighted by the continuedv energization of a licor segment indi- Vidual thereto as a result of the successive engagement therewith of a plurality of brushes, each being successively energized by means of a transfer relay controlled by additional segments and brushes on the floor selector and the function of the switches controlling the operation of the elevator car motor.

Other objects of my invention will, in part, be obvious, and, in part, appear hereinafter,

My invention, accordingly, is disclosed in the embodiment hereof shown in the accompanying drawings and comprises the features of construction, combination of elements, and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated in the appended claims.

For a more complete understanding of the nature and scope of my invention, reference may be had to the following detailed description, taken in connection with the accompanying drawings, in which:

Figure 1 illustrates diagrammatically the arrangement of an elevator car in a shaft to which my invention may be applied; l5

Fig. 2 is a diagrammatic layout of the stationary and movable elements of a floor selector of the notching type;

Figs. 3 and 4 illustrate diagrammatically the circuit connections which may be used in practicing my invention, it being understood that Fig. 4 represents a continuation of the circuit connections shown in Fig. 3; and,

Fig. 5 is a layout showing the arrangement of the contact members which are associated with the different switches and relays.

General description According to my invention, I have provided an elevator system in which an elevator car is operated in a shaft by means of a motor under the control of a suitable control system. In order to stop the car at any particular floor, up and down call buttons are provided at each iloor in the customary manner. Likewise, up and down hall lanterns are provided at each floor for indicating that the elevator car individual thereto is to answer the call which has been registered by the operation of a call button.

A floor selector of the notching type is provided 4.0 for operation in conjunction with the movement of the car in the shaft for the purpose of picking up calls that have been registered and for lighting the corresponding hall lanterns, together with certain other control functions. The brush carriage of the oor selector is operated by means of a notching motor which is started by the car passing from one oor to another. The notching motor then operates for a suflicent time to move the brush carriage from one floor position to another.

When the car approaches a floor Where a call is registered, it is picked up through call pick-up segments and brushes on the floor selector. As a result, a slow-down sequence of the control system for the motor operating the car is initiated. At the same time, a hall lantern energizing segment and brushes complete a circuit for energizing the hall lantern at the floor where the call is registered.

Since it is desirable to light the hall lantern before the floor position individual thereto is reached by the floor selector, it is necessary to transfer the circuit for the hall lantern from the hall lantern brush originally effecting its energization to a subsequent hall lantern brush. For this purpose, a transfer relay is provided having normally closed contact members in the circuit to the preceding or leading brush and normally open contact members in the circuit to the succeeding r trailing brush. The leading and trailing brushes are spaced less than one segment length apart, so that the trailing brush is caused to engage Va segment before the leading brush leaves it. The lantern at a floor where a call is registered is lighted as soon as the leading brush engages the corresponding segment.

While the hall call brushes are both in engagement with the segment individual to the hall lantern at a oor where a call is registered, a pair of transfer brushes engage a transfer segment to complete an energizing circuit for the transfer relay, which then completes a circuit for holding itself in. The transfer relay is energized only in the event that the slow-down sequence has been initiated and the control effecting the operation of the elevator car motor at high speed has been deenergized. The energizing circuit for the hall lantern is then transferred from the leading brush to the trailing brush and is maintained until the car answers the call.

The foregoing sequence of operation takes place while the floor selector is beingy operated from its position corresponding to the floor preceding that at which a call is registered to a position corresponding to the floor at which the call is registered. As the floor selector approaches the latter position, a notching control segment of the floor selector is engaged by a brush which is effective to complete a circuit for deenergizing the notching motor operating the brush carriage. As a result, the brush carriage is stopped at a position which corresponds to the floor where the call is registered.

Additional segments are provided on the floor selector for cancelling the call that was registered. These segments are connected in circuits in such manner that a second call cannot be registered at a floor for the same direction of travel until the first call has been answered and cancelled.

Description of apparatus Referring now particularly to Fig. 1 of the drawings, the reference character I designates, generally, an elevator car which is supported by means of a cable 2 passing over a sheave 3 and balanced by a suitable counterweight 4. The sheave 3 may be driven by means of a suitable motor 5, which is controlled by apparatus that will be described hereinafter.

In order to control the operation of the car I so that it may be stopped at any floor Where a call is registered, a iloor selector, shown generally at B, is provided. As is illustrated more clearly in Fig. 2 of the drawings, the floor selector 6 comprises a brush carriage 1, which may be supported by means of a cable 8 passing over sheaves 9 and balanced by a suitable counterweight CW. A notching motor M is provided aocasa for driving one of the sheaves 9 as illustrated, and the control therefor will be described hereinafter.

As illustrated, the floor selector 6 is provided with several rows of segments, with which certain brushes carried by the brush carriage 1 are disposed to engage. The operation of the motor M is controlled by means of notching control segments II, 3l, 5I with which brushes I0 and I9 are disposed to successively engage. Transfer segments 22, 32, 42, 52, together with brushes 20 and 29 are provided for effecting the energization of the transfer relay to maintain a hall lantern lighted at a floor where a call is registered. Calls may be cancelled by call cancelling segments 23, 33, 43, 53 in the up direction, and brushes 30 and 39, and by means of segments I4, 24, 34, 44 and brushes 4l) and 49 in the down direction.

YRegistered calls are picked up in the up direction In order to successively energize the motor M for operating the floor selector 6 from floor to iioor, a notching inductor switch K is carried by the car I. The switch K is provided with normally closed contact members KI and K2.

When the operating winding of the switch K is energized, and the Contact members KI are moved in proximity to either plate 2K or plate 4K, located in the shaft, the contact members will be opened during the time when they are in proximity to these plates. are moved out of proximity to these plates, they are again closed. In like manner, contact members K2 are opened when they are moved into proximity with plates 3K and 5K and are closed as soon as they are moved out of proximity therewith.

A slow-down inductor switch E is also carried by the car I, and is provided with normally closed contact members EI and E2. The slowdown inductor switch E is provided for reducing the speed of the motor from the high speed condition to a slow speed condition. When the operating winding of the slow-down inductor switch E is energized and the car is approaching a floor in the up direction at which a call is registered for that direction, contact members EI will be opened, on coming in proximity to any one of the plates 2UE, BUE, GUE or SUE, depending on the floor where a call is registered. The Contact members EI will remain open as long as the operating winding of the slow-down inductor switch E remains energized. In like manner, contact members E2 will be operated when the car is moving in a down direction on coming into proximity with inductor plates IDE, 2DE, 3DE and 4DE.

On approaching a floor a landing inductor switch G is effective to stop the motor 5 at the floor Where the call is registered. It is provided with normally closed contact members GI and G2. In approaching a floor in the up direction,

the Contact members GI are opened on coming into proximity with inductor plate ZUG, 3UG, 4UG or SUG, depending on the floor where a call is registered. Likewise, in the down direc- 75 As soon as they f operating windings of' the notching motor control relays NA and NB.

The transfer relay T is energized,

LI, T, Y1, V4, L2

and an obvious holding circuit therefor is completed.

Since the up direction preference relay W and the transfer relay T are energized, and the car I is at the first oor, the up hall lantern IUL will be energized.

LI, IUL, segment I1, brush '10, W9, T3, R4, L2.

It will be assumed that the push button switch PB is operated to effect the energization of the conditioning relay Y,

LI, PB, Y, L2

and an obvious holding circuit therefor is completed. As long as the conductors LI and L2 are maintained energized, the conditioning relay Y will also remain energized.` However, prior to its energization, the previously traced circuits have been completed which are effective to initiate the proper sequence of operations.

It will now be understood that car I is at the first iloor and that the up hall lantern IUL is lighted to indicate that the car I is next to leave that oor. It will be assumed that a call is registered at the third floor, due to the operation of the up call button 3U. The up call storing relay 3UR is then energized,

LI, 3U, 3UR, L2

and a holding circuit therefor is completed through contact members 3URI.

It will now be assumed that the car I receives a signal to leave the first floor. The operator then moves the master switch MS to the up position, and as a result, the up reversing switch U and the reset relay R are energized.

LI, MS, GI, U, R, door interlocks, gate contacts, YI, L2

A holding circuit is completed through contact members U5 for maintaining the foregoing circuit.

In response to the energize-tion of the up reversing switch U, a circuit is completed for energizing the generator eld winding GF to apply the proper polarity to the armature of the motor 5, so that it will operate the car I in the up direction.

LI, U2, GF, U3, TI, L2

The high speed switch V is then energized,

LI, U4, EI, V, L2

and the resistor rl is short-circuited, thereby applying maximum energization to the field winding GF.

The energization of the high speed switch V opens the previously traced energizing circuit for the operating winding of the transfer relay T and it is deenergized. The energizationof the reset relay R opens the previously traced energizing circuit for the hall lantern IUL, and it is extinguished. In addition, the energization of the reset relay R completes a circuit for energizing the operating winding of the notching inductor switch K LI, K, R2, L2

for the purpose of effecting the operation of the notching motor M as the car I passes from iloor to ioor.

As the car I moves toward the second iioor, the contact members KI of the notching inductor switch K come into proximity with the inductor plate 2K, and as a result, they are opened momentarily, and effect the deenergization of the operating winding of the notching control relay NA. A circuit is then completed for eiecting energization of the notching motor M.

LI, Y2, r3, W3, armature of motor M, W4, NAI, L2

The notching motor M then operates the brush carriage 'I towards the position corresponding to the second iloor position. However, the car I continues to move and contact members KI are closed as soon as they are moved out of proximity to the inductor plate K2. Due to the fact that the energizing circuit for the notching control relay NA Was completed through its make contact members NA3, it is not reenergized as soon as contact members KI are reclosed.

As the brush carriage 'I is moved upwardly by means of the notching motor M, brush 50 is caused to engage segment 35 which had previously been energized on the operation of the call storing relay SUR by the closure of contact members SURZ, thereby connecting the segment 35 directly to the conductor LI. A circuit is then completed for effecting the energization of the operating winding of the hall call pick-up relay S.

LI, SURE, segment 35, brush 50, W5, S, L2

The holding relay H is immediately energized,

LI. sl, H, R3, L2

and at contact members H2, it completes a holding circuit for itself. In addition, the operation of the hall call pick-up relay S completes an obvious energizing circuit for the operating winding oi the slow-down inductor switch E in parallel with the operating winding of the holding relay H. A further result ci the operation of the holding relay H is to complete a circuit for energizing the cancelling winding 3URC of the hall storing relay SUR.

LI, SURI, BURC, segment 33, brush 39, WI, T2, HI, L2

The cancelling winding 3URC it will be understood, is arranged to oppose the main energizing winding of the call storing relay SUR and as a result, the contact members thereof are opened. The opening of contact members 3UR2 then opens the previously traced energizing circuit for the hall call pick-up relay S and it is deenergized.

In order to indicate that the car I is to answer the call at the third floor, the hall lantern 3UL is lighted.

LI, 3UL, segment 31., brush 19, W1, T4, H3, L2

The continued movement of the brush carriage 'I by the notching motor M finally causes brush I to engage segment I I and as a result, a circuit is completed for again energizing the operating winding oi the notching control relay NA.

LI, segment II, brush I0, WIG, NA, L2

Since contact members KI are now closed, the previously traced energizing circuit for the operating winding of the relay NA is again completed and it remains energized. The energization of the notching control relay NA, however, opens the previously traced energizing circuit for the notching motor M and it not only is deenergized,

tion,1contact membersGZ are opened oh coming intoproximity to inductor plate IDG, 2DG, 3DG-or 4DG. Contact members GI and G2 are arranged to be maintained in the open position after having once been operated to that position as longas the operating winding of the landingv inductor switch G remains energized.

The inductor switches K, E and G may be of the type disclosed in Patent No. 1,902,602, granted March 21, 1933 to Williams, et al., and assigned to the assignee of this application.

Referring now particularly to Figs. 3 and 4 of the drawings, it will be observed that knife switches 9U and 9| are provided for connecting conductors LI and L2 to a suitable source of direct current. It will also be noted that a push button switch PB is provided for effecting the energization of a conditioning relay Y, which on being energized, completes a circuit for holding itself in. The conditioning relay Y is provided for initiating certain operations which will be apparent hereinafter. One of these operations is to insure that up preference relay W is energized when the car I is at the lower terminal when initially starting up the system after it has been shut down. A down direction preference relay X is also provided which is disposed to be energized when the car I is to be operated in the down direction. The preference relays W and X are effective to condition circuits for operating the floor selector 6 in a direction depending upon the direction of movement of the car I.

The motor 5 is provided with a main field winding 5MF, which is connected to be continually energized across the conductors LI and L2. The armature of the motor 5 is connected as illustrated, across the armature of a generator G in accordance with the connections in a Ward-Leonard control system. The voltage generated in the armature of the generator G is controlled by means of a generator eld winding GF, the polarity of which may be reversed by means of up and down reversing switches U and D, respectively, under the control of a manually operable master switch MS. The operating windings of the up and down reversing switches U and D are energized in series circuit relation with the operating winding of a reset relay R, which serves to restore the system to the normal condition as soon as the car I stops at a oor. A brake B is pro-vided for stopping further rotation of the motor 5 as soon as the generator field winding GF has been deenergized. The brake B is immediately released as soon as either of the reversing switches U or D is operated.

In order to operate the motor 5 at maximum speed, a high speed switch V is provided. The high speed switch V is arranged to short circuit a resistor rl which is connected in series circuit relation with the generator eld winding GF at all times that it is energized. When the high speed switch V is energized, maximum excitation is applied to the generator eld winding GF and, in turn, maximum voltage is applied to the armature of the motor 5 for causing it to operate at maximum speed.

As set forth hereinbefore, the brush carriage 'I of the floor selector 6 is operated by means of a notching motor M. It will be observed that the notching motor M is controlled by means of notching motor control relays NA and NB, either of which on being deenergized is disposed toeffect theY energization of the motor In. order to stop the further' operation of. the notching motor M, by dynamic braking as soon as both of the control relays NA .and NB are energized, the iield winding MF of the motor M is connected to be constantly'energized across the conductors LI and L2and a resistor r2 is connected across the armature of the motor M, a major portion of which may be short-circuited by means of vcontact members on the control relaysv NA and NB. Normally one or the other of these relays is energized and the other, on being energized, completes the resistance shunting circuit for dynamically braking the motor M. A resistor r3 is connected in series .circuit relation with the armature of the motor M in order to provide proper regulation therefor.

In the customary manner, each floor is provided with upi and down call buttons IU, 2U, 3U, 4U and 2D, 3D, 4D, 5D, respectively. As the car I approaches a iioor where a call has been registered, a hall call pick-up relay S is energized,

ywhich is effective to initiate the slow-down sequence for the car I by causing the operating winding of the slow-down inductor switch E to be energized.

Since the hall call pick-up relay S is only momentarily energized, a holding relay H is provided for maintaining the operating winding of the slow-down inductor switch E energized, and also for conditioning a circuit to effect the energization of the operating winding of the landing inductor switch G as soon as the high speed switch V has been deenergized.

Hall lanterns IUL, 2UL, SUL, 4UL are provided for indicating that the car individual thereto is to answer a call in the up direction. In like manner, hall lanterns 2DL, 3DL, IDL and 5DL are provided for indicating that the car is to answer calls in a down direction.

For the purpose of maintaining the hall lantern lighted at a oor where a call is registered, a non-flicker transfer relay T is provided. The relay T is arranged'to successively energize the brushes 'I9 and 'I0 in the order named when the car I is operating in the up direction, and to successively energize brushes and 89 in the order named when the car I is operating in the down direction.

' Description of operation In describing the operation of an elevator system organized in accordance with my invention, it will be assumed that the switches and 9| are closed so that conductors LI and L2 are energized. It will be observed that car I in Fig. 1 and the brush carriage I of the oor selector 6 in Fig. 2 are shown in the positions which obtain when the car I is at the third floor. In like manner, the relative positions of the various brushes and segments of the floor selector 6 are illustrated in Figs. 3 and 4 on the assumption that the car I is at the third oor.

As soon as the Aswitches 90 and 9| are closed, and since it is assumed that the carl is initially at the bottom floor, up direction preference switch W will immediately be energized.

Ll, D6, X5, W, L2

Also notching motor control relays NA and NB will be energized.

Ll, Kl, YB, NA, L2 LI, K2, Y6, NB, L2

Obvious holding circuits are provided forlthe75.

but is dynamically braked on the closure of contact members NA2.

The car is still traveling at full speed until it passes the second oor and contact members El of the slow-down inductor switch E come into proximity with the inductor plate 3UE. Since the operating winding of the inductor switch E is energized the contact members El are opened, and as a result, the previously traced energizing circuit for the high speed switch V is opened. It is deenergized and the resistor TI is reinserted in series circuit relation with the generator field winding GF. The car I then decelerates due to the reduced speed of the motor 5, and continues to approach the third floor. In so doing, contact members K2 of the notching inductor switch K are moved into proximity with the inductor plate 3K, and they are thereby opened momentarily. The energizing circuit for the notching motor control relay NB is then opened and it is deenergized. At contact members NB2 a circuit is completed for again effecting the energization of the armature of the notching motor M in a manner similar to that described hereinbefore. The notching motor M then operates the brush carriage 1 toward the third oor position.

Before the brush 19 leaves the hall lantern energizing segment 31, the brush 1D which is spaced somewhat less than one segment length therefrom, engages this segment. In addition, before the brush 19 leaves the segment 31, both brushes 2U and 29 are in engagement with transfer segment 32, and as a result, a circuit is cornpleted for again effecting the energization of the operating winding of the transfer relay T.

LI, T, brush 20, segment 32, brush 29, V3, L2

An obvious holding circuit is completed for the operating winding of the transfer relay T.

Before the contact members T4 which are in series circuit relation with the brush 19 are opened, contact members T3 are closed to complete the energizing circuit for the up hall lantern 3UL through brush 10.

LI, 3UL, Segment 31, brush 10, W9, T3, H3, L2

It will be apparent, therefore, that the hall lantern 3UL will be maintained lighted and it Will not flicker or momentarily go out as the brush carriage 1 is operated into the third oor position and brush v'I9 leaves the segment 31.

The continued operation of the brush carriage l in the up direction nally causes brush I9 to engage notching control segment 3 I, thereby completing a circuit for again effecting the energization of the notching motor control relay NB.

LI, segment 3|, brush I9, W8, NB, L2

Since contact members K2 were again closed as soon as they passed out of proximity to the induotor plate 3K, the previously traced holding circuit for the relay NB is completed, and it remains energized. The notching motor M is then deenergized and is again dynamically braked.

As the car I approaches the third floor, contact members GI of the landing inductor switch G are moved into proximity with the inductor plate 3UG and they are opened. As a result, the operating windings of the up reversing switch U an-d the reset relay R. are deenergized and this switch and relay open. The opening of the reset relay R opens the energizing circuit for the operating winding of the notching inductor switch K and it is deenergized. In addition, the energizing circuits for the operating windings of the holding relay H, the slow-down in-ductor switch E and the landing inductor switch G, are opened, and they are deenergized.

The car I is now at the third floor, and the -doors may be opened to admit the passengers thereat. The doors may then be closed and the foregoing starting and running sequence may be repeated. It will be obvious that, when calls are registered at other fioors, a sequence similar to that described hereinbefore for the third floor will result, and therefore, it is not described in detail herein.

While I have ilustrated and described the novel circuit for maintaining the hall lantern lighted at the floor where a call is registered as the car approaches that floor, in connection with a floor selector of the notching type, it will be understood that floor selectors of other types may be use-d involving these same novel circuit connections. Therefore, since certain further changes may be made in the foregoing construction, and different embodiments thereof may be made'without departing from the scope of my invention, it is intended that all matter shown in the accompanying drawings or set forth in the above description shall be interpreted as illustrative and not in a limiting sense.

I claim as my invention:

l. In an elevator system having a car operable past a plurality of floors, in combination, a hall lantern for each oor, means for registering a call at each floor, a floor selector including a segment individual to each hall lantern for effecting the energization of said hall lanterns when the corresponding segments are energized; means for operating said floor selector in steps, each step being initiated at a predetermined point in the travel of said car; and means for effecting the energization of the segment individual to the hall lantern located at a floor where a call is registered when said car is more than one floor distant from said floor where the call is registered.

2. In an elevator system having a car operable past a plurality of floors, in combination, a hall lantern for each Iloor, means for registering a call at each oor, a floor selector including a segment individual to each hall lantern for effecting the energization of said hall lanterns when Vthe corresponding segments are energized; means for operating said floor selector in steps, each step being initiated at a vpredetermined point in the travel of said car; means for effecting the energization of the segment individual to the hall lantern located at a iloo'r where a call is registered when said car is more than one floor distant from said door where the call is registered, and means for maintaining said last-named segment energized while said floor selector is being operated from one position to another.

3. In an elevator system having a car operable past a plurality of oors, in combination, a hall lantern for each floor, means for registering a call at each ioor, a oor selector; means for operating said floor selector in steps, each step being initiated at a predetermined point in the travel of said car; and means including said floor selector for effecting the energization of the hall lantern located at a floor where a call is registered when said car is more than one floor distant from said oor where the call is registered.

4. In an elevator system having a car operable past a plurality of floors, in combination, a hall lantern for each floor, means for registering a call at each floor, a door selector; means for operating said iloor selector in steps, each step being initiated at a predetermined point in the travel of said car; means including said floor selector for effecting the energization of the hall lantern located at a oor where a call is registered when said car is more than one oor distant from sai-d oor where the call is registered, and means for maintaining said hall lantern energized while said floor selector is operated from one position to another.

5. In an elevator system having a car operable past a plurality of oors, in combination, a hall lantern for each lloor, means for registering a call at each iioor; a floor selector including a segment individual to each hall lantern for effecting the energization of sai-d hall lanterns when the corresponding segments are energized, and a plurality of brushes each disposed to sequentially engage said segments; electrical connections between said brushes, and relay means for controlling said connections to maintain the hall lantern lighted at a floor where a call is registered.

6. In an elevator system having a car operable u past a plurality of floors, in combination, a hall lantern for each floor, means for registering a call at each floor; a floor selector inclu-ding a series of stationary elements each individual to a hall lantern for effecting the energization thereof when the corresponding stationary elements are energized, a plurality of movable elements each disposed to sequentially engage said stationary elements, and means for moving said movable elements in steps, each step being initiated at a predetermined point in the travel of said car; electrical connections between said movable elements, and relay means for controlling said connections to maintain the hall lantern lighted at a floor where a call is registered.

'7. In an elevator system having a car operable past a plurality of floors, in combination, a motor for operating said car, switch means for controlling the operation of said motor, signalling means for each iloor, means for registering a call at each floor; a floor selector including a series of stationary elements each individual to a signalling means for effecting the energization thereof when the corresponding stationary elements are energized, and a plurality of movable elements each disposed to sequentially engage said stationary elements; electrical connections between said movable elements, and relay means for controlling said connections to maintain said signalling means energized at a oor where a call is registered.

8. In a control system including a iloor selector for an elevator car, operable past a plurality of floors, in combination, a series of stationary elements corresponding respectively to said floors, a plurality of movable elements each disposed to sequentially engage said stationary elements; means for moving said movable elements in steps, each step being initiated at a predetermined point in the travel of said car; electrical connections between said movable elements, and relay means for controlling said connections.

9. In an elevator system having a car operable past a plurality of floors, in combination, a motor for operating said car, switch means for controlling the operation of said motor, signalling means for each floor, means for registering a call at each floor; a oor selector including a series of stationary elements each individual to a signalling means for electing the energization thereof when the corresponding stationary elements are energized, a plurality of movable elements each disposed to sequentially engage said stationary elements, and means for moving said movable elements in steps, each step being initiated at a predetermined point in the travel oi said car; electrical connections between said movable elements, relay means for controlling said connections to maintain said signalling means energized at a oor where a call is registered, and means including additional stationary and movable elements associated with said floor selector and disposed to cooperate with said switch means for controling the operation of said relay means.

l0. In a control system including a floor selector for an elevator car operable past a plurality of floors, in combination, a series of stationary elements corresponding respectively to said floors, a plurality of movable elements each disposed to sequentially engage said stationary elements, electrical connections between said movable elements, and means including additional stationary and movable elements included in said floor selector for controlling said connections.

ll. In a control system including a floor selector for an elevator car operable past a plurality of floors, in combination, a series of stationary elements corresponding'respectively to said floors, a plurality of movable elements each disposed to sequentially engage said stationary elements, means for moving said movable elements in steps, each step being initiated at a predetermined point in the travel of said car, electrical connections between said movable elements, and means including additional stationary and movable elements associated with said floor selector for controlling said connections.

l2. In an elevator system having a car operable past a plurality of floors, in combination, a hall lantern for each iioor, means for registering a call at each floor; a oor selector including a series of vstationary elements, each individual to a hall lantern for effecting the energization thereof, a plurality of movable elements each disposed to sequentially engage said stationary elements for energizing the hall lanterns at floors where calls are registered, vand a motor for actuating said movable element; means respsonsive to the movement of said car from one floor to another for rendering said motor effective to actuate said movable element, means for rendering said motor ineffective to actuate said movable element, electrical connections between said movable elements, and means for controlling said connections to maintain the hall lantern energized at the oor where a c all is registered.

13. In an elevator system having a car operable past a plurality of floors, in combination, a hall lantern for each floor, means for registering a call at each iioor; a floor selector including a segment individual to each hall lantern, and a plurality of brushes spaced less than a segment length apart and disposed to sequentially engage said segments for energizing a hall lantern at a floor where a call is registered; electrical connections between said brushes, and means including additional segments and brushes included in said floor selector for controlling said connections to maintain said hall lantern energized.

14. In an elevator system having a car operable past a plurality of oors, in combination, a hall lantern for each floor, means for registering a call at each iloor; a floor selector including a series of stationary members each individual to a hall lantern, and a plurality of movable members disposed to sequentially engage said stationary members for energizing a hall lantern at a iioor where a call is registered; electrical connections between said movable members, relay means for controlling said connections to maintain said hall lantern energized, and means comprising additional stationary and movable members included in said floor selector for controlling said relay means.

15. In an elevator system having a car operable past a plurality of iioors, in combination, a motor for operating said car, switch means for controlling the operation of said motor, a hall lantern for each floor, means for registering a call at each floor; a ioor selector including a series of stationary members each individual to a hall lantern, and a plurality of movable members each disposed to sequentially engage said stationary members for effecting the energization of a hall lantern at a floor where a call is registered; electrical connections between said movable members, and means including additional stationary and movable members included in said floor selector for controlling said connections to maintain said hall lantern energized.

16. In an elevator system having a car operable past a plurality of floors, in combination. a motor for operating said car, switch means for controlling the operation of said motor, a hall lantern for each floor, means for registering a call at each floor; a iioor selector including a series of stationary members each individual to a hall lantern, and a plurality of movable members each disposed to sequentially engage said stationary members for effecting the energization of a hall lantern at a floor Where a call is registered; electrical connections between said movable members, relay means for controlling said connections to maintain said hall lantern energized, and means including additional stationary and movable members included in said floor selector and disposed to cooperate with said switch means for controlling said relay means.

17. In a signal system for an elevator operable past a plurality of fioors, in combination; a hall lantern for each iioor; a floor selector; means responsive to car movements for moving said floor selector in a plurality of step motions; means responsive to one of said movements for lighting only one of .said hall lanterns and means comprising selector mechanism for maintaining said lantern lighted continuously While said selector makes an additional movement.

18. In a control system for an elevator operable past a plurality of iioors, the combination of a controller for said car for starting and stopping it, a push button at each floor, means responsive to an operation of said push buttons for causing said controller to stop said car only at oors where push buttons have been operated, a floor lantern at each of said oors, a notchng type iioor selector, means to illuminate said oor lantern only at the floor at which said car is prepared to stop and means to maintain said lantern lighted continuously excluding all others while said selector moves from one position to another.

19. In an elevator system having a car operable past a plurality of oors, in combination, a hall lantern for each floor, means for registering a call at each floor; a floor selector including a segment individual to each hall lantern for effecting the energization of said hall lanterns when the corresponding segments are energized, and a plurality of brushes each disposed to sequentially engage said segments to effect the energization of a hall lantern at a floor where a call is registered when the elevator car is more than one iloor distant therefrom; electrical connections between said brushes, and relay means for controlling said connections to maintain the hall lantern lighted at a floor where a call is registered.

20. In an elevator system having a car operable past a plurality of floors, in combination, a motor for operating said car, switch means for controlling the operation of said motor, signalling means for each oor, call registering means at each floor, a oor selector including a series of stationary elements each individual to a signalling means for effecting the energization thereof when the corresponding stationary elements are energized, and a plurality of movable elements each disposed to sequentially engage said stationary elements to eiect the energization of a signalling means at a floor where a call is registered when the elevator car is more than one floor distant therefrom; electrical connections between said brushes, and relay means for controlling said connections to maintain said signalling means energized at a iioor where a call is registered.

HAROLD W. WILLIAMS. 

